參數(shù)資料
型號： MAX6958
廠商： Maxim Integrated Products, Inc.
元件分類： 通用總線功能
英文描述： Dual 4-Bit Binary Counters 14-CDIP -55 to 125
中文描述： 2線接口、3V至5.5V、4位、9段LED顯示驅(qū)動器，帶有鍵掃描
文件頁數(shù)： 15/19頁
文件大小： 270K
代理商： MAX6958
pullup resistor from IRQ/SEG9 to a voltage no greater
than 5.5V when configuring IRQ/SEG9 as an interrupt
or logic output.
INPUT1 and INPUT2 can be individually configured as
either general-purpose logic inputs or as keyscan
inputs. In either mode, the input structure is the same
—
CMOS logic inputs with internal pullup resistors. The
pullups are always enabled, even in shutdown. Ensure
these inputs are either close to V+ or open circuit for
minimum shutdown supply current. If both INPUT1 and
INPUT2 are assigned to keyscan, then eight keys can
be debounced. If only INPUT1 or INPUT2 is assigned
to keyscan, then only four keys can be debounced.
M
2-Wire Interfaced, 3V to 5.5V, 4-Digit,
9-Segment LED Display Drivers with Keyscan
______________________________________________________________________________________
15
DIG1/SEG1
DIG2/SEG2
DIG3/SEG3
DIG0/SEG0
THE FIRST HALF OF A 41ms KEYSCAN CYCLE
THE SECOND HALF OF A 41ms KEYSCAN CYCLE
A
B
START OF NEXT KEYSCAN CYCLE
INTERRUPT ASSERTED IF REQUIRED
KEY DEBOUNCED REGISTER UPDATED
1.28ms MULTIPLEX
CYCLE 1
INPUT2
INPUT1 Key0
FIRST TEST OF KEYS
SECOND TEST OF KEYS
t
DEBOUNCE
Key1 Key2 Key3
Key4 Key5 Key6 Key7
Key0 Key1 Key2 Key3
Key4 Key5 Key6 Key7
C
D
E
A
1.28ms MULTIPLEX
CYCLE 2
1.28ms MULTIPLEX
CYCLE 3
1.28ms MULTIPLEX
CYCLE 4
1.28ms MULTIPLEX
CYCLE 15
1.28ms MULTIPLEX
CYCLE 16
1.28ms MULTIPLEX
CYCLE 1
1.28ms MULTIPLEX
CYCLE 2
1.28ms MULTIPLEX
CYCLE 15
1.28ms MULTIPLEX
CYCLE 16
5
μ
s TO 315
μ
s DIGIT PERIOD
Figure 14. Keyscan Timing Diagram
REGISTER DATA
MODE
ADDRESS
CODE
(HEX)
D7
D6
D5
D4
D3
D2
D1
D0
This is the bit assignment:
Read GPIO register
0x06
Read back
IRQ/SEG9
configuration
Read back
INPUT 2
configuration
Configure
INPUT 2:
0 = logic input
1 = keyscan
Read back
INPUT 1
configuration
Configure
INPUT 1:
0 = logic input
1 = keyscan
INPUT2
logic level
INPUT1
logic level
IRQ status
( 1 = i nter up )
Write GPIO register
0x06
Configure
IRQ/SEG9
output
X
X
X
Here are the IRQ/SEG9 allocation options, determined by the settings of D7, D6, D5:
IRQ/SEG9 is logic 0 output
0x06
0
IRQ/SEG9 is logic 1 output
0x06
0
0
0
0
1
X
X
X
X
X
X
X
X
X
X
IRQ/SEG9 is active-low
IRQ
0x06
0
1
0
X
X
X
X
X
IRQ/SEG9 is active-high
IRQ
0x06
0
1
1
X
X
X
X
X
IRQ/SEG9 is segment
driver
0x06
1
X
X
X
X
X
X
X
Table 16. Port Configuration Register Format
相關(guān)PDF資料
PDF描述
MAX6958AAPE Dual 4-Bit Binary Counters 14-CFP -55 to 125
MAX6959 2-Wire Interfaced, 3V to 5.5V, 4-Digit, 9-Segment LED Display Drivers with Keyscan
MAX6959AAPE 2-Wire Interfaced, 3V to 5.5V, 4-Digit, 9-Segment LED Display Drivers with Keyscan
MAX6958-MAX6959 2-Wire Interfaced, 3V to 5.5V, 4-Digit, 9-Segment LED Display Drivers with Keyscan
MAX6959AAEE Circular Connector; MIL SPEC:MIL-C-5015; Body Material:Metal; Series:GT; No. of Contacts:8; Connector Shell Size:22; Connecting Termination:Solder; Circular Shell Style:Square Flange Receptacle; Body Style:Straight
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX6958AAEE 功能描述:LED顯示驅(qū)動器 3-5.5V 4-Digit 9-Seg LED Display Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
MAX6958AAEE+ 功能描述:LED顯示驅(qū)動器 3-5.5V 4-Digit 9-Seg LED Display Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
MAX6958AAEE+T 功能描述:LED顯示驅(qū)動器 3-5.5V 4-Digit 9-Seg LED Display Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
MAX6958AAEE-T 功能描述:LED顯示驅(qū)動器 3-5.5V 4-Digit 9-Seg LED Display Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
MAX6958AAPE 功能描述:LED顯示驅(qū)動器 RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
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